【文章內(nèi)容簡介】 key,” said Thompson , who was attending a mining engineers’ conference .Such a mission would take 11 to 12 months to get to Mars and it would be impossible to carry enough water for the astronauts , plus the water needed to make rocket fuel for the return journey , to cool the spacecraft and generate energy .Thompson said scientists had found a deep valley on Mars “that makes the Grand Valley look like a small one” , where water could still be present .“There are signs that there is actually water that spreads out the side of the valley ,and going down the side it changes into steam and disappears . We believe it’s an ongoing process,” he said .Three satellites now moving round Mars are constantly gathering information , and Thompson said “If there is water , we believe the chances of finding life are greatly increased.”60．From this passage , we can infer . A．there was once sign of life on Mars B．it won’t be long before man lands on Mars C．only if we find water on Mars could man land on it D．Mars is another planet where man can live 61．Mars’ surface is a large area of . A．flat land B．desert C．mountain D．rough land 62．It would take for an astronaut to make a journey to the Mars . A．one month B．a(chǎn)bout a year C．20 to 30 years D．three months 63． man will land on Mars in 20 or 30 years . A．It is probable that B．It is uncertain whether C．It’s impossible that D．It’s out of question that CNative Americans from the southeastern part of what is now the United States believed that the universe in which they lived was made up of three separate , but related , worlds : the Upper World , the Lower World , and This World . In the last there lived humans , most animals , and all plants .This World , a round island resting on the surface of waters , was hanging from the sky by four cords joined to the island at the four points of the pass . Lines drawn to connect the opposite points of the pass , from north to south and from east to west , crossed This World to divide it into four wedgeshaped(楔子狀的) parts . Thus a signal representation of the human world was a cross within a circle , the cross showing the crossing lines and the circle——the shape of This World .Each part of This World was shown by its own color . According to Cherokee principle, east was connected with the color red because it was the direction of the Sun , the greatest god of all . Red was also the color of fire , believed to be directly connected with the Sun , with blood , and therefore with life . Finally , red was the color of success . The west was the Moon part 。 it provided no warmth and was not lifegiving as the Sun was . So its color was black . North was the direction of cold , and so its color was blue (sometimes purple 紫色的) , and it represented trouble and defeat . South was the direction of warmth 。 its color , white , was connected with peace and happiness .The southeastern Native Americans’ universe was one in which opposites were constantly at war with each other , red against black , blue against white . This World stayed somewhere between the perfect order and predictability (預言) of the Upper World and the total disorder and unsteadiness of the Lower World . The goal was to find some kind of halfway path , or balance , between those other worlds .64．Which of the following is the best title for the passage ? A．One Civilization’s View of the Universe B．The Changing of the Seasons in the Southeast C．The Painting of Land Maps by Southeastern Native Americans D．The War Between Two Native American Civilizations 65．The author implies that This World was situated . A．inside the Upper World B．inside the Lower World C．a(chǎn)bove the Upper World D．between the Upper World and the Lower World 66．According to the passage southeastern Native Americans pared This World to . A．waters B．sky C．a(chǎn)n animal D．a(chǎn)n island67．According to the passage , southeastern Native Americans connected red with all of the following EXCEPT . A．fire B．trouble C．blood D．success DTHANKyou cards——heartfelt expressions of gratitude for gifts , services and general kindness——seem to be rare in an age when the Internet continues to reduce human touch .Although our society has changed greatly over the past century , the etiquette of thankyou notes has not .While most people would agree that thankyou notes under these conditions are a necessity , there are still those who forever delay or are forgetful for unknown reasons .And at no time of the year are thankyou notes more visible (or lacking) than June , the month of graduations , and the beginning of summer parties .“It’s a mustdo thing . A real thank you does not e by . It es in the mail in an envelope . And what es out of an envelope is a beautiful thing to touch and to handle and to pass around for everyone to read ,” said etiquette expert Letitia Baldrige .Don’t think for a second that Baldrige is oldfashioned . Handwritten thankyou notes——any handwritten letter , for that matter ——have taken on an air of extra importance in this ehyper 電子狂躁的) world .Baldrige remains hopeful that the art may be enjoying a renaissance (復興).More than simply obeying rules of etiquette , thankyou cards are a sign of caring .“They’re more important now than ever,” expert Peter Post says. “You are building a relationship . And part of building that relationship is that you recognize it when someone has done something nice for you .”“The payoff ,” Post says , “can be huge. The more we do it , the more it es back to us , and it’s a benefit to us all . It makes our world a little bit nicer place to live in .”68．Nowadays thankyou cards seem to be rare mainly because . A．people think that they are out of fashion B．it is quicker to say thanks by C．the Internet has reduced our chances of getting together D．people are too busy to